switching between "tu" and "vous" in a sentence

Kathleen,

 “ Unless you literally live with the person or (that) you see each other every day “ 

The hint in the lesson is to use ‘ tu ‘ for ‘ you ‘ in the general commentary, as if addressing a single person informally, or speaking of oneself in 2nd person, so ‘ tu ‘ fits in the first clause.

However,  that cannot work in ‘you see each other every day ‘ as the ‘ you ‘ in this clause has to be plural - vous - and the verb in the pronominal (reciprocal) form. 

‘ … tu te voies’ would be ‘ (you) see yourself ‘, not 2 people seeing each other.